Index: llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
+++ llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
@@ -6176,7 +6176,7 @@
   // The register may be specified by name or using a numeric code
   HwReg.Loc = getLoc();
   if (isToken(AsmToken::Identifier) &&
-      (HwReg.Id = getHwregId(getTokenStr())) >= 0) {
+      (HwReg.Id = getHwregId(getTokenStr(), getSTI())) >= 0) {
     HwReg.IsSymbolic = true;
     lex(); // skip register name
   } else if (!parseExpr(HwReg.Id, "a register name")) {
Index: llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h
===================================================================
--- llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h
+++ llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h
@@ -601,7 +601,7 @@
 namespace Hwreg {
 
 LLVM_READONLY
-int64_t getHwregId(const StringRef Name);
+int64_t getHwregId(const StringRef Name, const MCSubtargetInfo &STI);
 
 LLVM_READNONE
 bool isValidHwreg(int64_t Id, const MCSubtargetInfo &STI);
Index: llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
+++ llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
@@ -1026,7 +1026,9 @@
 
 namespace Hwreg {
 
-int64_t getHwregId(const StringRef Name) {
+int64_t getHwregId(const StringRef Name, const MCSubtargetInfo &STI) {
+  if (isGFX10(STI) && Name == "HW_REG_HW_ID") // An alias
+    return ID_HW_ID1;
   for (int Id = ID_SYMBOLIC_FIRST_; Id < ID_SYMBOLIC_LAST_; ++Id) {
     if (IdSymbolic[Id] && Name == IdSymbolic[Id])
       return Id;
Index: llvm/test/MC/AMDGPU/sopk.s
===================================================================
--- llvm/test/MC/AMDGPU/sopk.s
+++ llvm/test/MC/AMDGPU/sopk.s
@@ -230,7 +230,7 @@
 s_setreg_b32 hwreg(HW_REG_HW_ID), s2
 // SICI: s_setreg_b32 hwreg(HW_REG_HW_ID), s2       ; encoding: [0x04,0xf8,0x82,0xb9]
 // VI9:  s_setreg_b32 hwreg(HW_REG_HW_ID), s2       ; encoding: [0x04,0xf8,0x02,0xb9]
-// NOGFX10: error: specified hardware register is not supported on this GPU
+// GFX10: s_setreg_b32 hwreg(HW_REG_HW_ID1), s2   ; encoding: [0x17,0xf8,0x82,0xb9]
 
 s_setreg_b32 hwreg(HW_REG_HW_ID1), s2
 // NOSICIVI: error: specified hardware register is not supported on this GPU